Rare elements in coal /
by R.F. Abernethy and F.H. Gibson.
APA Citation
Abernethy, R. F. (Roy Franklin)., Gibson, F. H. (1963). Rare elements in coal. Washington: Bureau of Mines.
MLA Citation
Abernethy, R. F. (Roy Franklin), 1905-1990, and F. H Gibson. Rare Elements In Coal. Washington: Bureau of Mines, 1963.
Warning: These citations may not always be complete (especially for serials).